Magnetic pulley



c'. 6. aucHANAN.

Mamba Jam 18,1921.`

@JMW

l different Widths of belts may be built up size of puiley Various modifications may be resorted tc from a stock of standard parts simply by assembling a correseponding number of units together. The magnetic disks 14 and the spools or bobbins 12 are of steel and the formation of all the parts requires only the vary simplest machining operations and all similar parts are easily made identical by standard jigs and templets. The bobbin or coil holder l1 does not necessarily have to be made of magnetic material but can be made of fiber or brass, either cast or spilli. and cast iron could be used instead of steel Without affecting the strength of the steel pole pieces or magnetic disks.

While the invention has been described in connection with a specific embodiment and a small two unit pulley has been used for illustration, it is understood that any may be built up and that wit-hin the principle of the invention as set forth in the appended claims.

I claim l. In a magnetic pulley the combination with a supporting shaft, of coil supporting spools mounted on and engaging said shaft, magnetic disks abutting the ends oi said spools, spacer rings extending between the peripheral portions of said disks and forming therewith -a belt engaging pulley surface substantially coextensive with the length of said pulley, and means for binding said parts into a rigid uulley.

2. In a magnetic pulley the combination with a supporting shaft, of -a series of spaced magnetic disks on said shaft, spacer rings bridging the outer portions of said disks and supported thereby, and coil supp' rting spools mounted directly oli said shaft independently of said disks.

CHARLES G. BUCHANAN. 

